Nozzle for air brushes



June 9, 1925. 1,540,805

C. L. REICHENBACH NOZZLE FOR AIR BRUSHES Filed June 2. 1923 7C2 INVENTOR Z" Patented June 9, 1925.

UNITED STATES PATENT OFFICE.

CARL L. REIOHENBACH, OF YONKERS, NEW YORK, ASSIGNOR TO HOWARD W. BEACH,

OF NEWARK, NEW JERSEY.

NOZZLE FOR AIR BRUSHES.

Application filed June 2, 1923. Serial No. 642,952.

To all whom it may concern:

. Be it known that I, CARL L. REIOHENBACH, a citizen of the United States, and a resident of Yonkers, county of Westchester, and State brushes adapted to so direct the air on the material being vaporized and applied that the particles within the stream pursue a helical or twisting path, but confines the stream as a whole to a path that is substantially cylindrical.

This nozzle is particularly adapted for the application of heavy and viscous materials, such as varnish, lacquers and the like, although it can also be used for the application of paints and lighter materials and permits a ready overlapping of the applications, so that when the job is finished the coat has been applied smoothly.

The invention is illustrated in the accompanying drawing, in which Figurel is a front view of the improved nozzle, and Figure 2 is a half side view and half central section of the nozzle shown in Figure 1.

The nozzle comprises a nozzle casing 10 which is applied to the end of the barrel of an air brush usually by means of screwthreads 11 and receives from the barrel of the air brush air under pressure which is projected through a main central opening 12, and this main central opening is adapted to have the velocity of the air passing therethrough increased by suitable means, and I show for this purpose an inner nozzle 13 applied to that part of the barrel of the air brush which conducts the paint or varnish or other materialto be applied, this nozzle being usually secured by the screw-threads 14 and has a bore 15 through which such.

material passes.

The opposed faces of the inner wall of the nozzle casing and the outer wall of the inner nozzle converge forwardly and diminish as they extend forward, this being accomplished by tapering the outer face 16 of the inner nozzle and also tapering the inner face 17 of the nozzle chamber, the face 16 being tapered to a less degree relative to the longitudinal axis of the nozzle than the face 17 The nozzle casing has a side passage or passages shown at 18 having the outlet or outlets 19 arranged tangentially relative to the central main bore 12. In the drawing 1 show two of such side passages, and the arrow in Figure l indicates how these tangential streams issue relative to the stream emerging from the main bore 12. These outlets are also arranged so that they incline slightly forwardly, that is, in the direction of the stream emerging from the main bore, so that these combined streams will form a spray or mist that has a circular movement and which also proceeds forward against the surface to be coated. i

This spray is substantially cylindrical, not converging as it proceeds, because the velocity of the stream emerging from the mainbore counteracts the centrifugal force of the streams emerging from the side openings 19 and forms a substantially cylindrical stream of vapor or mist which is projected in very fine particles with a whirling motion against the surface being coated.

It will be evident that the adjustment of the nozzle casing relative to the inner member will regulate the velocity of the stream emerging from the main orcentral bore.

To prevent distortion of the nozzle in contact-with objects, I provide substantial abutments 20 on the face of the nozzle casing and usually cast in one piece with the nozzle casing, so that distortion or mutilation of these abutmentsor of the outlets ofthe side passages is prevented.

I claim: j

1. A nozzle for air brushes'comprising a .1 nozzle casing having a central main opening, side passages having their outlets inclined slightly forwardly relative to the stream i from the main borev and tangentially arranged relative to said main bore, and an inner nozzle member located inside the nozzle casing, the opposed walls of the member and casing being tapered at different degrees to provide a forwardly converging tapered pasmain bore, and means in said nozzle casing sage. for increasing the velocity of the stream 2. A nozzle for air brushes comprismg a from the main bore. 10 nozzle casing having a central mam opemng, In testimony that I clalm the foregomg,

. side passages having their outlets inclined I have hereto set my hand, this 21st day of slightly forwardly relative to the stream October, 1922. from the main bore and tangential to said C. L. REICHENBACH. 

